Samuel Rea (1855–1929). Johnstown Flood National Memorial, National Park Service, U.S. Department of the Interior. Abgerufen am 6. März 2015.
John C. Paige: History of the Altoona Railroad Shops. America’s Industrial Heritage Project, United States Department of the Interior, National Park Service, 1989. Abgerufen am 13. April 2015.